Best PC Security & Optimisation Software UK 2026
Six real products compared — all-in-one suites, single-purpose cleanup tools, personal data-removal services, backup utilities and website security — so you pick the right one instead of the loudest one.
| # | Product | Best for | Rating |
|---|---|---|---|
| 1 | Iolo System Mechanic Ultimate Defense | ⭐ Best all-in-one PC security & speed bundle | 9.4/10 |
| 2 | iolo SUPERAntiSpyware | Best for removing an active infection fast | 9.0/10 |
| 3 | iolo RemoveMe | Best for deleting your data from data-broker sites | 8.8/10 |
| 4 | Abelssoft PC Fresh | Best budget PC cleanup tool | 8.5/10 |
| 5 | O&O Software | Best for PC backup & defragmentation | 8.7/10 |
| 6 | Sucuri | Best for website owners, not just PCs | 8.6/10 |
The picks in depth
Iolo System Mechanic Ultimate Defense
⭐ Best all-in-one PC security & speed bundleUltimate Defense is iolo's flagship bundle: real-time malware protection, its long-running PC optimisation engine (registry repair, junk-file cleanup, startup manager, driver updates) and a set of privacy tools, sold as a single subscription rather than three separate purchases. If your PC feels slow AND you want protection running in the background without juggling multiple apps, this is the sensible starting point — it's the one product on this page built to cover most of what an everyday Windows user needs.
Check current price →iolo SUPERAntiSpyware
Best for removing an active infection fastSUPERAntiSpyware is a focused scanner and remover — it's designed to be installed on a PC that's already showing symptoms (pop-ups, hijacked browser settings, unfamiliar toolbars, a machine that's suddenly crawling) and to clean that infection out. It's not trying to be a full security suite; it's a specialist tool for one job, which is exactly why it's useful as a second opinion alongside whatever antivirus you already run, or as an emergency step before you consider a full Windows reinstall.
Check current price →iolo RemoveMe
Best for deleting your data from data-broker sitesThis one is different from the others on this page — it's not PC-optimisation software at all. Your name, address, phone number, family details and browsing habits are quietly bought and sold by data-broker sites, and anyone can pay a few pounds to look you up. RemoveMe is a personal-data-removal service: it finds where your information is listed across these broker sites and sends takedown requests on your behalf, then keeps checking because brokers tend to re-list people over time. It protects your privacy, not your PC's performance.
Check current price →Abelssoft PC Fresh
Best budget PC cleanup toolPC Fresh is Abelssoft's lightweight cleanup tool — it clears out junk files, temporary data and browser clutter, and pairs well with the company's AntiBrowserSpy utility for stripping tracking out of your browser settings. Being honest about it: this is a smaller, cheaper alternative to a bundle like Ultimate Defense, not a replacement for it. It doesn't include malware protection or the deeper registry-level repair tools. If your budget is tight and you just want a straightforward once-a-month "empty the bins" tool, this is a reasonable, low-cost option.
Check current price →O&O Software
Best for PC backup & defragmentationO&O makes a family of German-engineered disk utilities, and the two that matter most here are O&O DiskImage (full-system backup and image cloning) and O&O Defrag (drive defragmentation for anyone still running a mechanical hard drive, or wanting to keep an SSD organised). Most of the products on this page are not full antivirus tools, and none of them protect you from hardware failure either — a proper backup is the one thing that does, which is why O&O earns its place here even though it's a different category to picks 1-4.
Check current price →External Backup Hard Drive / SSD
O&O DiskImage needs somewhere to actually write your backups. A 2TB+ external drive kept unplugged between backups (or physically separate from your PC) is the cheapest real insurance against drive failure, ransomware or accidental deletion — pair it with any backup software on this page.
Check price on Amazon →Sucuri
Best for website owners, not just PCsThis is our bonus pick if you run a website — Sucuri isn't for protecting your own PC at all, it's for protecting a WordPress site, small-business website or blog from malware injections, DDoS attacks and blacklisting by Google. If you're only here to speed up or secure your personal laptop, skip it. If you also run a website (even a small one) alongside your PC, Sucuri's website firewall and malware-removal service covers a risk none of the other five products on this page touch.
Check current price →What to look for
The six products above aren't six versions of the same thing — they split into five different categories, and picking the right one starts with knowing which category you actually need. All-in-one suites like Iolo System Mechanic Ultimate Defense bundle malware protection with PC optimisation, so they suit anyone who wants one subscription covering "keep it safe and keep it fast" without managing separate tools. Single-purpose cleanup tools like Abelssoft PC Fresh do one job — clearing junk files and light privacy cleanup — cheaply, but they won't stop malware and won't repair a badly degraded system the way a full suite will. Infection-removal specialists like SUPERAntiSpyware are built for a PC that's already compromised; install one when you're troubleshooting symptoms, not as your everyday background protection. Backup and disk-utility software such as O&O is a different category entirely — it doesn't stop attacks, it protects you from the aftermath of drive failure, ransomware or accidental deletion, and it's only useful if you're actually backing up to separate physical storage. Personal data-removal services like RemoveMe protect your identity and privacy on the open web rather than your device. And website security tools like Sucuri protect a completely different asset — a site you run — rather than the computer in front of you. Most people end up needing two or three of these categories, not one product that claims to do everything.
Frequently asked
Do I need antivirus AND a PC optimisation tool?
They solve different problems, so yes, ideally you want both, though not necessarily as separate purchases. Antivirus and anti-malware stop and remove malicious software; optimisation tools clean up junk files, fix registry issues and manage startup programs that build up over normal use and slow a PC down over time. A bundle like Iolo System Mechanic Ultimate Defense covers both in one subscription, which is why it's worth considering before buying two separate products.
Is my personal data really for sale online?
Yes — this is one of the least understood parts of online privacy. Data-broker sites compile and sell personal details (names, addresses, phone numbers, relatives, even estimated income) scraped from public records and other sources, and anyone can search for a small fee. This happens whether or not you've ever used the internet directly — the data often comes from public records, not your own browsing. Services like RemoveMe exist specifically to find these listings and request they be taken down on your behalf.
What's the difference between backup software and disk cleanup software?
Cleanup software (like PC Fresh or System Mechanic's optimisation tools) removes files you no longer need to make your PC faster. Backup software (like O&O DiskImage) copies the files you DO need to a separate location so you can recover them if your drive fails, you're hit by ransomware, or you delete something by accident. They're not interchangeable — running only a cleanup tool leaves you with zero protection if your hard drive physically dies.